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As iconic as Brachiosaurus altithorax is, it’s known from surprisingly little material.

I was cleaning out my Downloads directory — which, even after my initial forays, still accounts for 11 Gb that I really need to reclaim from my perptually almost-full SSD.

Just a quick post about the genesis of the Brachiosaurus rib paper (Taylor and Wedel 2023) that I wrote about at the very end of last year. Although this is in some respects a minor paper, I’m fond of it because it fell into place so quickly and easily.

As we’ve often observed, it’s a funny thing that incredibly well-known dinosaur specimens can sit around for decades, or for more than a century, before someone notices something fascinating about them. One lesson to learn from this is the importance of collections — their creation, maintenance and accessibility. Another is of course to always look at the fossils we see.

As all good SV-POW! regulars will know, Elmer S. Riggs published the name Brachiosaurus altothorax in a short (but not trival) 1903 paper (Riggs 1903) and followed it up with a proper descriptive monograph (Riggs 1904) that had several useful plates. I’ve never seen a real copy of the latter (or indeed the former), so for the last quarter-century I’ve made do with various low-quality photocopies and scans.

That’s FMNH PR 25107, better known as a the holotype of Brachiosaurus altithorax — the biggest known dinosaur at the time of its description (Riggs 1903) and still for my money one of the most elegant, along with its buddy and one-time genus-mate Giraffatitan brancai . I had a spare morning in Chicago two Tuesday ago, and Bill Simpson (collection manager of fossil vertebrates at the Field Museum) managed to fit it a collections

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My Oct. 13 National Fossil Day public lecture, “Lost Giants of the Jurassic”, for the Museums of Western Colorado – Dinosaur Journey is now up on their YouTube channel. First 48 minutes are talk, last 36 minutes are Q&A with audience, moderated by Dr. Julia McHugh. New stuff from the 2021 field season — about which I’ll have more to say in the future — starts at about the 37-minute mark.